| Waimea River | |
| Pushpin Map: | United States Oahu |
| Pushpin Map Caption: | Location of the mouth within Oahu |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Hawaii |
| Subdivision Type4: | County |
| Subdivision Name4: | Honolulu County |
| Length: | 1.5miles, total length |
| Source1 Location: | Waimea Valley |
| Mouth Location: | Waimea Bay |
| Mouth Coordinates: | 21.6407°N -158.0632°W |
| Basin Size: | 13.6sqmi |
The Waimea River is a river in Honolulu County on the island of Oahu in the U.S. state of Hawaii. The river's main channel is 1.5miles long and has a watershed spanning 13.6 square miles, with a total length of when its tributaries are included.[1] It is formed by the confluence of the Kamananui stream and the Kaiwikoʻele stream northeast of Haleiwa and flows northwest through the Waimea Valley to the Pacific Ocean at Waimea Bay. The name Waimea translates to "red water."[2]
The mouth of the river has become famous for its waves that are created when residents dredge the beach, creating a channel that allows the watercourse to drain when it is cut off by the beach.[3] [4]